Police are appealing for witnesses to a collision in Marine Parade, Worthing, which involved a black moped and a dark coloured BMW saloon.
The vehicles collided at 9.30pm on Thursday, May 9, and the driver of the BMW drove off from the scene without providing any details.
There is no further description of that vehicle at this stage.
The moped rider, a 19-year-old Worthing man, was treated at Worthing Hospital for minor injuries.
PC Ben Henwood of the Sussex Road Policing Unit said; “If you have any information please call us on 101 quoting Serial 1477 of 9/5.”